The ROTO-FLOAT is a direct acting switch. Each ROTO-FLOAT contains a single pole mercury switch which actuates when the longitudinal axis of the float is horizontal, and deactuates when the liquid level falls 1" below the actuation elevation.

The float is a chemical resistant polypropylene casing with a firmly bonded electrical cable protruding. One end of the cable is permanently connected to the enclosed mercury switch and the entire assembly is encapsulated to form a completely water tight and impact resistant unit. Type S - Suspended has built in weight.

ROTO-FLOATS can be mounted on a support pipe (Type P) or suspended from above (Type S). Advantages of the ROTO-FLOAT are low cost, simplicity and reliability.